There is also the question of where to put Placozoa, they still might be the true sister group to all others. But these are so simple and little known that ther

There is also the question of where to put Placozoa, they still might be the true sister group to all others. But these are so simple and little known that there might just not be enough data to know for sure. If we disregard Placozoa, I would also have bet on the sponge-sister scenario. https://en.wikipedia.org/wiki/Placozoa https://en.wikipedia.org/wiki/Placozoa